JP2766879B2 - Work scaffold - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a work scaffold used when performing work in a relatively high place such as interior finishing work of a ceiling at a building construction site or the like. .

(Prior Art) When a building is constructed, interior finishing is performed after building a skeleton. In this case, a work scaffold is used for finishing work in a relatively high place such as a ceiling.

Conventionally, a work scaffold generally used is a work scaffold by arranging a stepladder in which pipes are assembled in a substantially triangular shape, and laying a scaffold plate over the stepladder.

Further, there is a case in which a construction site and a fabric material of the frame member are assembled, and a scaffold plate is laid thereon to form a work scaffold.

(Problems to be Solved by the Invention) However, in such a work scaffold, since the scaffold member and the scaffold plate are separate, the assembling work is troublesome. Also, it becomes bulky during storage and transportation,
Requires more storage space.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a work scaffold that can be folded more compactly and that can perform assembly work easily and reliably. It is.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the invention according to claim 1 is provided with one rectangular stage portion for performing an operation and a leg length adjusting portion for adjusting a leg length. A leg portion rotatably attached to the stage portion so as to be set to a storage position by being folded and to be set to a use position by being expanded, and provided on the leg portion. A moving wheel, between the stage and the leg, a use position holding means for automatically holding the leg in the use position when the leg is expanded, and At least a rattling preventing means for preventing rattling, wherein the use position holding means is provided so as to fit in and withdraw a groove formed corresponding to the use position of the leg portion, When fitted into An engagement member for holding the leg in the use position, a guide portion for guiding the engagement member into the groove as the leg rotates, and the engagement member when the leg is at least in the use position. And a biasing means for biasing the joining member so as to fit into the groove.

The invention according to claim 2 further includes an auxiliary wheel for transporting the work scaffold in a state where the legs are folded, and the auxiliary wheel protrudes from an end surface of the stage section to enable the work scaffold to be transported. It is characterized by being provided rotatably so as to be set at a position and a position not protruding from the end face of the stage section.

According to a third aspect of the present invention, there is further provided a connecting means for connecting to another work scaffold, wherein the connecting means comprises holes formed at four corners of the rectangular stage, Are provided slidably and rotatably in two directions on the four diagonal lines of the four corners in a direction orthogonal to the stage in proximity to a hole formed at the corner, and engage with the hole when not in use. And a connecting member which is held together and can be engaged with a hole of another stage formed in the same manner as the stage during use.

(Operation) In the work scaffold according to the present invention having such a configuration, when the legs are expanded from the storage position to the use position, the engagement members are moved by the urging means of the use position holding means. By being fitted into the groove, it is automatically and securely held in its use position. Therefore, the work scaffold is easily and reliably set in the use state.

Further, when the leg length of the leg is adjusted, rattling of the leg length adjusting unit is prevented by the rattling preventing means. With this, the leg length adjustment section is firmly connected, and the height of the stage section is reliably maintained at a desired height,
The stage portion is stably supported by the leg portion in which the backlash is prevented.

Also, since there is only one stage, the work platform is not greatly expanded, and the space occupied by the platform is small. Therefore, even if the passage area is smaller, the work scaffold can be easily moved to another place while being set in the use state, and the freedom of movement of the work scaffold is increased.

Further, by rotating the auxiliary wheel to a position where the work scaffold can be carried in a state where the legs are folded, the work scaffold can be easily carried by the work scaffold by the auxiliary wheel. When the legs are expanded and set for use, the auxiliary wheels are rotated to a position where they do not protrude from the end surface of the stage so that the auxiliary wheels do not interfere with the work. Can be.

On the other hand, by connecting several work scaffolds by the connection means, the work scaffold area can be increased. In this case, the stages can be connected by simply engaging the connecting member with the holes of the other stages, so that the connecting operation is simplified.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of one embodiment of a work scaffold according to the present invention,
FIG. 2 is a side view of the work scaffold, and FIG. 3 is a front view of the work scaffold.

As shown in FIGS. 2 and 3, the work scaffold 1 is composed of a rectangular stage 10 and legs 20. As shown in FIG. 1, a stage section 10 is a frame in which a rectangular cylindrical vertical frame 12 and a rectangular cylindrical horizontal frame 13 are provided in a substantially rectangular cylindrical peripheral frame 11 assembled in a rectangular shape. It has a structure. On these frames 11, 12, and 13, a tread plate 14 made of a wire mesh such as expanded metal is fixed by welding.

Four plates 15 having a pair of holes 15a and 15b are welded to the four corners of the stage 10, respectively. A pair of connecting members 16 are provided on a pair of diagonal plates 15 among these plates 15. As shown in FIG. 4, the connecting member 16 is formed by bending a round bar into a substantially L-shape, and includes first and second arm portions 16a and 16b and a connecting portion 16c. And the first arm part 16a is a plate
It is slidably and rotatably fitted in one of the holes 15a in the vertical direction. A compression coil spring 17 is contracted between a plate 16 and a pin 16d detachably attached to the tip of the first arm 16a, and the connecting member 16 is constantly urged downward by the spring 17. This allows
The wobble of the connecting member 16 is prevented, and
Is stopped.

This connecting member 16 is used to connect two or more work scaffolds 1. When not used, the second arm 16b is inserted into the other hole 15b and protrudes outward from the stage 10. It is held in the unused position so as not to be disturbed (the upper left end connecting member in FIG. 1). On the other hand, when used, the connecting member 16
Is upwardly opposed to the urging force of the spring 17 by the second arm 16b.
Is lifted up until it comes out of the hole 15b, and is turned, whereby the second arm 16b projects outward of the stage 10 to be in the use position (the lower right end connecting member in FIG. 1).

Then, as shown in FIG. 5, for example, two scaffolds 1a, 1
When connecting b, either in the case of connecting in the short direction shown in FIG. 11A or in the case of connecting in the longitudinal direction shown in FIG. 10B, the connecting member at the lower right end of one scaffold 1a. Rotate the second arm 16b to the other scaffold 1
b is inserted into the hole 15a of the plate 15 on the upper right end of the b or the hole 15a of the plate 15 on the lower left end of the other scaffold 1b, and the connecting member 16 on the upper left end of the other scaffold 1b is rotated to Place the arm 16b in the hole 1 of the plane 15 below the left end of one scaffold 1a.
5a or hole 15a of plate 15 on the upper right end of one scaffold 1a
, The two scaffolds 1a, 1b are connected to each other. In this case, the scaffolds can be connected by simply inserting the connecting member 16 into the hole 15a of the other scaffold 1b, so that the connecting operation is simplified.

More scaffolds 1 can be connected in substantially the same way. For example, when connecting nine scaffolds 1, 1,..., Each connecting member 16 of each scaffold 1 may be rotated as shown in FIG. In this way, a work scaffold with a larger workable area is formed.

On the other hand, the leg portion 20 has four legs 20a, 20a,. leg
20a includes a pair of first and second cylindrical leg members 21 and 22. In this case, the inner diameter of the first leg member 21 is the second leg member.
22 is larger than the outer diameter of the second leg member 22 inside the first leg member 21.
Is loosely fitted. These first and second leg members 21 and 22
A leg length adjusting means 23 is provided between them, and the length of the leg 20a can be adjusted according to the necessity of work by the leg length adjusting means 23.

As shown in FIG. 7, the leg length adjusting means 23 includes five length adjusting holes 22a, 22a,... Formed in the second leg member 22 at equal intervals α in the axial direction. And a lock pin 23a to be inserted into these adjustment holes 22a. The lock pin 23a is provided with an operating lever 2 loosely fitted to a bolt-shaped support member 23b fixed to the outer peripheral surface of the lower end of the first leg member 21.
3c, and slidably penetrates the hole of the first leg member 21. The operation lever 23c is constantly urged toward the first leg member 21 by a compression coil spring 23e contracted between the lever 23c and a support pin 23d fixed to the support member 23b. Therefore, the lock pin 23a is also
It is urged in a direction to always fit into 2a. Then, as shown in the figure, by turning the operation lever 23c in the direction of arrow A, the lock pin 23a can be pulled out from the adjustment hole 22a.

Further, the leg length adjusting portion between the first and second leg members 21 and 22 is provided with rattling preventing means 24. As shown in FIG. 9, the rattling preventing means 24 is provided with a first leg member 21.
Main body 24a fixed to the outer peripheral surface of
And a flat wedge member 24c penetrating a pair of holes 24b formed in the main body 24a. Further, the first leg member 21 is provided with a slot 21a at a position corresponding to the pair of holes 24b, 24b in the main body 24a. And wedge member 2
4c is inserted into the pair of holes 24b and the slot 21a, and is press-fitted in a direction in which the wedge width increases (in a direction from right to left in FIG. 9). The first leg member 21 is strongly pressed against the inner peripheral surface. As a result, rattling between the first and second leg members 21 and 22 is eliminated, the two leg members 21 and 22 are firmly connected, and the height of the stage 10 is reliably maintained at a desired height. At the same time, the stage portion 10 is stably supported by the leg portion 20 in which the backlash is prevented.

The legs 20a formed in this manner are connected to the four
Each is fixed to the lower surface of the corner and rotatably connected to a mounting bracket 25 having a substantially U-shaped cross section. In this case, as is clear from FIG. 2, each of the pair of legs 20a, 20a on the left end side or the right end side is connected to the first leg member 21.
Are connected to each other by two horizontal rails 21b and the second leg member 22 is connected to each other by one horizontal rail 22b. At the lower end of each leg 20a, a caster with a stopper conventionally used is used.
20b is attached.

As shown in FIG. 3, an upright holding means 26 is provided between the leg 20a and the mounting bracket 25 to hold the leg 20a at an upright position (shown by a two-dot chain line). As shown in detail in FIG. 10, the holding means 26 includes a guide portion 25c comprising a groove 25b formed on both side surfaces 25a of the mounting bracket 25 and a cam surface formed continuously with the groove 25b. One leg member 2
An axially elongated hole 21c formed at the upper end of 1 and a shaft extending between the pair of legs 20a, 20a at both left and right ends, penetrating the elongated hole 21c slidably in the longitudinal direction. It comprises a mating rod 26a and a compression coil spring 26b which constantly urges the engaging rod 26a toward the rotation shaft 21d of the first leg member 21.
Then, as shown by the solid line in FIG. 3 and as shown in FIG. 10 (a), from the folded position where the leg 20a is folded,
When it is turned to the upright position shown in FIG. 3 by the two-dot chain line and FIG. 10 (b), the engaging rod 26a is brought into contact with the guide portion 25c.
Abuts the cam surface of the
26a gradually moves along the oblong hole 21c in a direction against the urging force of the spring 26b. When the leg 20a comes to the standing position, the engaging rod 26a is fitted into the groove 25b by the urging force of the spring 26b. As a result, the leg 20a cannot rotate toward the folded position, and is held at the upright position. When the leg 20a is brought to the folded position, the engaging rod 26a is pulled up against the urging force of the spring 26b, pulled out from the groove 25b, and then the leg 20a is rotated. In order to hold the legs 20a in the folded position, the stage 10 is held by a belt or appropriate locking means (not shown).
It is conceivable to lock the lock on.

On the other hand, as shown in FIGS. 2 and 3, four auxiliary legs 27, 27,. The length β of the auxiliary leg 27 is set so as to be at least lower than the lowermost position of the leg 20a when the leg 20a is in the folded position. Therefore, the legs
When the work scaffold 1 is placed on the floor in a state where the work scaffold 1 is supported by the auxiliary legs 27 with the 20a folded, the legs 20a do not hit the floor surface.

Further, on the lower surface of the stage section 10,
Book auxiliary casters 28, 28 are provided. As is clear from FIGS. 4A and 4B, the auxiliary caster 28 is rotatably mounted on a support bracket 29 having a U-shaped cross section fixed to the lower surface of the stage section 10 by a rotary shaft 29a. I have. In this case, the support bracket 29
A pair of holes 29b and 29c are formed at a position almost directly above 29a and at a position substantially horizontal to the rotating shaft 29a. On the other hand, a hole (not shown) having substantially the same size as the pair of holes 29b and 29c is also formed in the support portion 28a of the caster 28.
When 28a is at a right angle to the stage 10, the hole 29b
The caster 28 is held at a right angle to the stage 10 by passing the lock pin 30 through the hole of the support 28a and the caster support 28a.
The caster 28 is held in a position parallel to the stage 10 by penetrating the lock pin 30 through the hole 29c and the hole of the support portion 28a when the position is substantially parallel to. When the caster 28 is positioned parallel to the stage 10, the caster wheels 28b
The work scaffold 1 can be easily transported by the caster wheels 28b in a state where the leg portion 29 is folded. When the caster 28 is at a right angle to the stage 10, the caster wheels 28 b
Will not protrude from this caster wheel while working
28b can be kept out of the way.

Further, as shown in FIG. 1 to FIG.
On the upper surface of are four fixed cylindrical members 31 of relatively short length. The cylindrical member 31 is disposed at a position corresponding to the auxiliary leg 27, and the auxiliary leg 27 is
Can be inserted into the hole. Therefore,
As shown in FIG. 11, when a large number of working scaffolds 1 are stacked during non-use such as during storage or transportation, when the auxiliary legs 27
, Whereby the relative movement of the work scaffold 1 is prevented, and the work scaffolds 1 can be stably stacked.

As described above, the work scaffold 1 of the present embodiment is formed as one unit by providing all the components necessary for exhibiting the function of the scaffold. Thus, when assembling the scaffold, there is no need to arrange new components, and the required components are not forgotten.

 Next, the operation of this embodiment will be described.

With the legs 20a in the folded position, as shown in FIG. 11, several working scaffolds 1 are stacked, for example, loaded on a truck or the like, and the working scaffolds 1 stacked by appropriate holding means such as ropes are combined into a truck. After being fixedly held, it is transported to the building construction site. At the construction site, the work scaffold 1 is lowered from the truck, and the auxiliary caster 28 is set at a position parallel to the stage 10 as shown in FIG.
The work scaffold 1 is transported to the interior of a building while rolling.

Next, the leg 20a stands upright. At this time, leg 2
0a is held in the upright position by the upright holding means 26. Next, after the wedge member 24c of the rattling preventing means 24 is loosened to make the first and second leg members 21 and 22 relatively movable, the leg length adjusting means 23 adjusts the height of the stage 10 to an optimum height for the work. Adjust the length of the legs 20a so that When the length of the leg 20a is adjusted to the optimum length, the first and second leg members 21 and 22 are fixed to each other by the backlash prevention means 24 so as to prevent rattling. Before and after this, the auxiliary caster 28 is set so as to be perpendicular to the stage unit 10.

Further, when the area of the scaffold 1 is small in performing the work, as shown in FIGS. 5 and 6, two or more work scaffolds 1 are connected by a connecting member 16 so that a necessary scaffold 1 is provided. Secure the area. In this state, the scaffold 1 is moved to the optimum position of the work place,
The caster wheel is fixed by the stopper b.

Thus, interior work such as the ceiling of a building can be performed. When the interior work is completed, the work scaffold 1 is moved to another room in order to perform interior work in another room.
In that case, loosen the stopper of the caster 20b and
After the rolling of 0b is enabled, for example, every one is transported according to the width of the moving passage of the scaffold 1 such as the door opening. Alternatively, a plurality of units are connected to move. The movement of the work platform 1 is simplified by the casters 20b.

When the work is completed, the work scaffold 1 is folded in the reverse procedure to make it compact and easy to carry.

The present invention is not limited to the above-described embodiment, and various design changes are possible.

For example, in the above-described embodiment, the step board 14 made of a wire mesh such as expanded metal is welded on the frames 11, 12, and 13, but the step board 14 is detachably attached to the frame by, for example, bolts. You can also. Further, the step board 14 may be formed of a simple plate-shaped body other than the wire mesh.

Further, in the above-described embodiment, the connecting member 16 is
May be provided on each of the pair of plates 15 on one side, or may be provided on all of the square plates 15. However, when a pair of connecting members 16 and 16 are arranged on a pair of diagonal plates 15 and 15 as shown in the drawing, the connecting members 16 are not only point-symmetric but also have an appropriate number, so And the usability of the work scaffold 1 becomes more favorable.

Further, in the above-described embodiment, the connecting member 16 protrudes from the upper surface of the stage portion 10, but as shown in FIG. 12, the connecting portion 16c of the connecting member 16 is located at a predetermined position of the frame of the stage portion 10. Is formed, and the connecting member 16c is fitted into the groove 10c.
It is also possible not to protrude from the upper surface of 10. The same applies to the unused position of the connecting member 16c. In this way, the work can be performed safely without tripping on the connecting member 16 during the work. Similarly, in the above-described embodiment, the cylindrical member 31 protrudes from the upper surface of the stage section 10.
Can also be provided buried below the upper surface of the stage unit 10. Further, instead of providing the cylindrical member 31, a hole in which the auxiliary leg 27 is fitted into the stage section 10 can be simply formed. In this case, if a small projection is formed at the lower end of the auxiliary leg 27 and this small projection is fitted into the hole formed in the stage section 10, the diameter of the fitting hole can be made smaller. In addition, it is desirable to secure the strength around the hole by reinforcing the periphery of the hole as necessary with appropriate means. By doing so, since the cylindrical member 31 does not protrude from the upper surface of the stage section 10, it does not trip over the cylindrical member 31 during work.

Further, the length adjusting hole 22a of the leg length adjusting means 23 is not necessarily 5
There is no limitation on the number, and an appropriate number can be provided. The adjustment holes 22a do not necessarily need to be arranged at equal intervals, and the intervals may be changed as necessary.

Further, steps may be provided on the work scaffold 1 to facilitate the climbing of the height-adjusted work scaffold 1 to and from the stage 10. In this case, if the step is made foldable, it can be prevented from being obstructed by folding the step during storage or transportation.
Also, this step does not necessarily need to be provided on every work scaffold 1, and by combining the work scaffold 1 with steps and the work scaffold 1 without steps, waste can be eliminated.

Furthermore, in the work scaffold 1 of the above-described embodiment, the leg length can be adjusted within a predetermined range. However, for example, work at a height exceeding the maximum leg length adjustment range, such as interior work inside the ceiling, etc. In order to be able to accommodate this, various work platforms with different maximum leg length adjustment ranges can be provided.

Further, it goes without saying that the frames 11, 12, and 13 can be formed of cylindrical members, and the first and second leg members 21 and 22 can be formed of rectangular cylindrical members.

(Effects of the Invention) As is clear from the above description, according to the work scaffold of the present invention, when the legs are expanded from the storage position to the use position, the legs are automatically moved by the use position holding means. Since the work scaffold is held at the use position, the work scaffold can be easily and reliably set to the use state. Therefore, the assembling work does not take much time, and the number of steps can be significantly reduced.

Also, when adjusting the leg length of the leg, the backlash of the leg length adjustment part is prevented by the rattling prevention means, so that the leg length adjustment part can be firmly connected and the height of the stage part is securely maintained at the desired height As well as being able to stably support the stage.

Also, since there is only one stage, the space occupied by the work scaffold when the legs are expanded is reduced. Therefore, even with a smaller passage area, the work scaffold can be easily moved to another place while being used, and the degree of freedom of movement is increased.

Further, by rotating the auxiliary wheel to a position where the work scaffold can be carried in a state where the legs are folded, the work scaffold can be easily carried by the work scaffold by the auxiliary wheel. When the legs are expanded and set for use, the auxiliary wheels are rotated to a position where they do not protrude from the end surface of the stage so that the auxiliary wheels do not interfere with the work. Can be.

Further, by connecting several work scaffolds by the connecting means, the work scaffold area can be increased. In that case, the stage members can be connected by simply engaging the connection member with the hole of the other stage portion,
Connection work is simplified.

[Brief description of the drawings]

1 is a plan view of one embodiment of a working scaffold according to the present invention, FIG. 2 is a side view of the embodiment, FIG. 3 is a front view of the embodiment, and FIG. FIGS. 5 and 6 are enlarged views showing a case where a large number of working scaffolds of this embodiment are connected, FIG. 7 is an explanatory view of a length adjusting hole in leg length adjusting means, and FIG. 9 is an explanatory view of the rattling preventing means, FIG. 10 is an explanatory view of the upright holding means, FIG. 11 is an explanatory view of a case where working scaffolds are stacked, and FIG. It is a figure which shows the Example of. 1 ... working scaffold, 10 ... stage, 16 ... connecting member (connecting means), 20 ... legs, 20 b ... moving casters (moving wheels), 26 ... standing holding means (use position holding) Means), 28 ... Auxiliary casters (auxiliary wheels)

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shintaro Clock 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hideo Suzuki 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction (72) Inventor Saburo Koseki 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Motoyoshi 2-18-3 Kyobashi, Chuo-ku, Tokyo SC Leasing Co., Ltd. Inside the Machinery (72) Inventor Atsuji Okamoto 3-7-15-402 Ogikubo, Suginami-ku, Tokyo (72) Inventor Ryoaki Kondo 8-22-4-408 Narashinodai, Funabashi City, Chiba Prefecture (56) References 1-154743 (JP, U) Actually open 64-6440 (JP, U)

Claims (3)

(57) [Claims] 1. A rectangular stage section for performing an operation,
A leg length adjusting portion for adjusting the leg length is provided, and the stage portion is rotatable so as to be set to a storage position by being folded and set to a use position by being expanded. The leg to be attached, the moving wheel provided on the leg, and the stage and the leg, when the leg is expanded, the leg is automatically moved to the use position. A use position holding means for holding, and at least a rattling prevention means for preventing rattling of the leg length adjusting portion, wherein the use position holding means is formed corresponding to a use position of the leg, An engaging member is provided so as to be fitted into and extracted from the groove, and holds the leg in a use position when fitted into the groove, and guides the engaging member into the groove as the leg rotates. Guide part and the leg A work scaffold comprising: urging means for urging the engaging member to fit into the groove at least when the portion is at the use position. 2. The vehicle according to claim 1, further comprising an auxiliary wheel for transporting the work platform in a state where the leg portion is folded.
The position which protrudes from the end face of the stage part, and which can carry the work scaffold, and is provided so that rotation is possible so that it may be set to the position which does not protrude from the end face of the stage part. 1. The work scaffold according to 1. 3. A connecting means for connecting to another work scaffold, the connecting means comprising a hole formed at a corner of the rectangular stage, and a connecting hole of the stage.
At two diagonal corners of the corner, slidably and rotatably provided in a direction orthogonal to the stage in proximity to a hole formed at the corner, and engaged with the hole when not in use. The work scaffold according to claim 1, further comprising a connecting member that can be engaged with a hole of another stage formed in the same manner as the stage when used.